INTERNATIONAL SCIENTIFIC SERIES.

NOW READY. In 12n-io, and bound in cloth. 1. FORMS OF WATER. Kv Prof. John Tyndall. |1.50. 2. PHYSICS AND POLITICS. By W. Bageuot. $1.50. 8. FOODS. By Edward Smith, M. D., LL. B., F. R. S. $1.75. 4. MIND AND BUDY. Bv Alexander Bain, LL. D. $1.50. 5. THE STUDY OF SOCIOLOGY. Bv Herbert Spencer. $1.50. 6. THE NEW CHEMISTRY. By Prof. .Tosiah P. Cooke, Jr. $2.00. 7. THE CONSERVATION OF ENERGY. By Prof Balfocr Stewaet. $1.50. 8. ANIMAL LOCOMOTION. By J. B. Pettigre-k-, M.D. $1.75. 9. RESPONSIBILITY IN MENTAL DISEASE. By H. Maitdslet, M.D. 11.50. 10. THE SCIENCE OF LAW. By Prof. Sheldon Amos. $1.75. 11. ANIMAL MECHANISM. By E. J. Marey. 117 Illustrations. $1.75. 12. CONFLICT BETWEEN RELIGION AND SCIENCE. By J. W. Draper, M.D. $1.75. 18. THE DOCTRINE OF DESCENT, AND DARWINISM. By Prof. O. ScmiroT. $1..'50. 14. THE CHEMISTRY OF LIGHT AND PHOTOGRAPHY. By Dr. Hermann VoGEL. 100 Illustrations. $2.00. 15. FUNGI; their Nature, Influence, and Uses. By M. C. Cooke, LL.D. Edited by M. J. Berkeley. 109 Illustrations. $1.50. 16. THE LIFE AND GROWTH OF LANGUAGE. By Prof. W. D. Whitney, of Yale College. $1.50. 17. MONEY AND THE MECHANISM OF EXCHANGE. By W. Stanley Jevons, M. a., F. R. S. $1.75. 18. THE NATURE OF LIGHT. By Dr. E. Lommel. 88 Hlustrations and a Plate of Spectra in Chromo-lithographv. $2.00. 19. ANIMAL PARASITES AND MESSMATES. By Prof. M. Van Beneden. 83 Illustrations. $1.50. 20. ON FERMENTATIONS. By P. Schutzenberger. $1.50. 21. THE FIVE SENSES OF MAN. Bv Prof J. Bernstein. $1.75. 22. THE THEORY OF SOUND IN ITS'RELATION 10 MUSIC. By Prof. Pietro Blaserna. Numerous Woodcuts. $1.50. 28. STUDIES IN SPECTHUM ANALYSIS. By J. N. Lockyer. $2.50. 24. A HISTORY OF THE GROWTH OF THE STEAM-ENGINE. By Robert H. Thurston, A. M., C. E. 1G3 Illustrations. $2.50. 25. EDUCATION AS A SCIENCE. By Ale.x. Bain, LL.D. $1.7.5. 26. MODERN CHROMATICS. By Prof 0. N. Rood. 130 original Illustrations. $2.00. 27. THE HUMAN SPECIES. By A. De Quatrefages. $2.00. 28. THE CRAYFISH: An Introduction to the Study of Zoology. By Prof T. H. Huxley. b2 Illustrations. $1.75. 29. THE ATOMIC THEORY". By Ad. Wurtz, Membre de Tlnstitut, etc. Trans- lated by E. Cle.minshaw. $1.50. 30. ANIMAL LIFE AS AFFECTED BY THE NATURAL CONDITIONS OF EXISTENCE. By Prof. Karl Semper. $2.00. 31. SIGHT: An Exposition of the Principles of Monocular and Binocular Vision. By Joseph Le Conte, LL. D. With numerou.s Illustrations. $1.50. 32. GENERAL PHYSIOLOGY OF MUSCLES AND NERVES. By Dr. I. Rosen- thal. With 75 Woodcuts. $1..50. 38. ILLUSIONS: A Psychological Study. By James Sully. $1.50. 34. THE SUN. By C. A. Y'oung. Ph.'D., LL. D., Professor of Astronomy in the College of New Jersey. With numerous Illustrations. $2.00. Any volume sent by mail, post-paid, on receipt of price. New York: D. APPLETON & CO., 1, 3, & 5 Bond Street.